Printing device for calculating machines



A ril 8,- 1924. 1,489,547

I F. RAUCHWETTER PRINTING DEVICE FOR CALCULATING MACHINES Filed y 19,1921 8 Sheets-Sheet 1 literacy April 8, 1924. 1,489,547

I F. RAUCHWETTER PRINTING DEVICE FOR CALCULATING MACHINES Filed May 19,1921 8 Sheets-Sheet 2 "utavne April 8, 1924. 4 1,489,547

F. RAUCHWETTER PRINTING DEVICE FOR CALCULATING MACHINES Filed May 19,1921 8 Sheets-Sheet 3 IIIIIIIIII Wi/nassa's:

$4 zz zjj w 172M rney.

V m'fnesses:

F. RAUCHWETTER PRINTING DEVICE FOR CALCULATING MACHINES Filed May 19.1921 8 Sheets-Sheet 4 Jnrenmr:

'MW v EM April 8 1924.

1 1,489,547 F. RAUCHWETTER PRINTING DEVICE FOR CALCULATING MACHINES IFiled May 19, 1921 8 Sheets-Sheet 5 April 8 1924.

1,489,547 F. RAUCHWETTER PRINTING DEVICE FOR CALCULATINGMACHINES FiledMay 19, 1921 8Sheets-Sheet 6 F. RAUCHWETTER I PRINTING DEVICE FORCALCULATING MACHINES Filed may 19. 1921 s SheetsrSheet 7 m'fnesses." J17remar:

Rttowzey April 8, 1924. 1,4 9,547

F. RAUCHWETTER PRINTING DEVICE FOR CALCULATING MACHINES Filed May 19.1921 s Sheets-Sheet 'a May-nay 50 means of a Patented 8,

uurraosraras 1,489,547 PATENT OFFICE. 1

FRANZ RA'UCHWET'PER, DECEASED, LATE OI BEBLIN-FBIEDENA U, GERMANY; BY IANNA BAUCHWITTIB, G13. BGHME, ammns'raa'rmx, OF BEBLIN-FBIEDENAU, GER-MANY; ALFRED ILATEB, {DESERT ADMINISTRATOR OF SAID FRANZ BAUCEWETTEB,

DECEASED.

I PRINTING DEVICE FOR CALCULATING MACHINES.

I Application filed Kay 19, 1921. Serial No. 471,017. v

To all whom it'ma concern. I

Be it knoyvn t at FRANZ RAUorrwa'rmR,

deceased, late a citizen, of the German Republic, and' residing atBerlin-Friedenau,

5 Germany, invented certain new and useful Improvements in PrintingDevices for Calculating Machines, of which the following is aspecification.

his invention refers to a printing device for calculating machines,especially for calculating machines operated by keys the object ofthedevice being to print any desired single number-as may be set on thekey board, as also, by means of a simple changeover device," to printthe sum total, of the counting mechanism; further, by a simple operationof a key the entire printing mechanism may be disconnected, and thecalculating machine may be used as any ordinary machine. Moreover thenew printing device has. an arrangement by means of which groups offigures may be printed. One part of the printing device, e. g. the 7left hand side, may print one group of fig- 2 ures, whilst the secondpart of the printing device prints another-group.

The characteristic of the new printin device. consists in the peculiardouble an at the same time releasing advance con trol of stops limitinthe travel ofthe printing types, combine with the uniform operation ofthetypes, in such a manner that corresponding to the advance control,either from the keys or from the counting mechanism, for the printing ofsums set upon the key board and ad ed together by'the countingmechanism, (i. e. the sum total), the travel of the t pe levers islimited. At the same time, if printing is to be done 40 from the keys,the advance control from the counting mechanism is switched out, andvice versa, if tinting is to be done from the counting mec anism, theadvance control from the keys is shoved aside.

It is, moreover, typical, that the driving gear of the printing devicemay be disconnected completely, inasmuch as the rocker leversoperatingthe printing device are connected to the main driving shaft hipeculiar lever-coupling whi may be cut in or out. In order to Print thesum total in a diflerent color from the individual s'umsitis essentialthat the type ribbon, subdivided in two colours, be inter-' locked withthe keys or with the counting mechanism of the printing gearrespectively in such a manner that it may be raised into differentpositions, corresponding to the colours of the type ribbon, by means ofcam control, thereby using one colour' forthe single printing, andanother for the sum total. 4

Below, the printing device is to be described systematically accordingto the draw in ig. l're resents a view of the printing device and itscontrol from the key board, certain parts of the driving. gear such asthe type lever drive, having been omitted.

in l

5 shows a view of the type lever shows a view similar to Fig. 1,

connection from the counting mechanism,

in the sition of rest, also the driving gear from t e main shaft of themachine.

Fig. 6 shows a view similar 'to Fig. 5, the drive, however beingrepresented in the 'engaged position with the counting mechanism, andthe hammer mechanism being in the position, ready for printing.

Fig. 7 shows how] the drive is disconnected for putting the printingworks out of commission.

Figs. 8, 8 9, 10, 11 are details of the hammer drive, and of thereciprocal coupling between the hammers for printing the ci- Fig. 12shows a plan view of the ar rangement for limiting the travel of thenumber disks, preven them from mov ing beyond the zero position duringprint- Fig, 13 shows the uncoupling'of the stop controlled in advance bythe keys and by the se ment driving the counting mechanism for theprinting of the totals.

Figs. 14 and le represent a second method of design of the printinghammers 1 and their continuous coupling, one with the P. number upon theboard, or by the counting mechanism (3), for printing the the impressionmay be made he hammer. The adjustment 1 e levers (1) is eiiected bymeans of the ireys (2), as also by the counting mechanism through anadvance control, limiting the distance through which the operating levertravels in accordance with the advance control. This is accomplished bythe keys (2), as shown on Figs. 1 and l, inasmuch as a slide rod 2' ismoved, corresponding to the travel of the key, this rod, in turn,controlling a lever (5) with a stop (6), the lever (5) swinging roundthe trunnion (4). The stop (6) limits the travel of the double swinginglever (8), (8) with stepped segment (9) by the latter hitting the stop(6) with a certain step, thereby being prevented from further followingthe movement of the driving crank (10) coupled to it by the spiralspring (11). This means that the movement of the type lever (1) which islikewise coupled to the arm (8' by, the lever (12) and the rod (13) islimited by the stop (6) in a manner, corresponding to the key which ispressed down. It should be noted that, when the machine is switched overfor printin from the counting mechanism, the stop (6) on the arm (5) maybe brought out of reach of the arms (8) of the double lever (8, 8'), bya lateral movement (Figs. 3 and 3f), as will be described later.

It should also] be noted that, naturally, the type levers are notarranged the same distance apart as the columns of the machine,- but inthe usual manner, as may be seen from Fig. 2, the lateral differences ofthe distances bein equalized b leading the double levers 12) at an ang eacross.

The control of the type levers from the counting mechanism is shown inFigs. 5 and 6 in two different positions, Fig. 5 showing the disengagedposition of the intermediate segment, the driving parts of the typelevers having been omitted; Fig. 6 showing the mechanism in the engagedposition, all details of the driving mechanism being represented. If itis desired to print from the counting mechanism, the sum key (14) Fig. 6is pressed down. B means of the slide rod (15) the sum key 14) adjuststhe rocker (17 swinging on the trunnion (16), in such a manner that itsface (18) enters in o th p th of ar ller h ch is mounted upon the doublerocker (20) turning on a fixed pin (21). At the same time the step (22)of the lever (17) enters below the stop (23) on the toothed segment(2 1) so that this toothed segment is taken along when the lever (17) isswitched over by the driving mechanism, i. e. the segment is raised andbrought Within reach of the disk of the counting mechanism (3) as shownin Fig. 6. During this upward movement the double lever (20) is likewiseswung over by the face (18) of the lever (17), whereby the rest (25) islifted up (Fig. 6), so that the stop (27) of the counter disk which inFig. 5 could clear the projection (28) of the rod (25), is now arrestedby the projection (28), thereby limiting the movement of the countingmechanism. The lever (5) for the stop (6) to be controlled in advance bythe keys is coupled,-by a double lever (30) turning on the trunnion (30)as shown on Figs. 6 and 13to the toothed segment (24) through theintermediary of the double lever (29) in such a manner that lever (5)together with the stop (6) are moved laterally in the direction of thearrow on Fig. 13, i. e. out of reach of the toothed segment (9) so thatthe printing mechanism is now no longer under the influence of the keys.

It is evident that after this advance control has been effected, thelifting of the type lever is limited by the travel of the disk of thecounting mechanism from the number thereon, to zero the reason beingthat the type levers (1), checked by the guide rod (13), and doublelever (12) with bell crank (8, 8 are now limited by the movement of theguide rod (31) corresponding to the travel of the toothed segment 24)and, therefore, of the counter disk (3).

The lever (10) for operatin the type levers from the crank (32) of themachine is driven-through the intermediary of guide rods (33, 33) of arocker (35) swinging about a fixed trunnion (34), further the guide rod(36) and the lever (37). At the same time the roller (38) (comp.starting position Fig. 5) of the rocker (39) swinging about the fixedpoint (38') is controlled by the slide rod (33') with rear extension, insuch a. manner that, running up upon the inclined plane (40) of thesliding rod, thi roller is raised, thereby raising the lever (17). Bythis lifting movement the rests for the stops of the counting mechanismare raised, together with the latter, in the engaged position and thetoothed segments are brought into the engaged position with the earwheels of the countlng mechanism. t the same time the advance controlfor the stop of the key pressure is disconnected.

n order t e. a le to use the a ulating ciphers.

machine also with the printing device dis connected the followingcut-out coupling between the driving gear and the counting mechanism hasbeen provided for (comp. Figs. 5, 6 and 7). As shown on Fig. 6 the lever(35) swinging round the trunnion (34) transmits the movement of thecrank (32) upon the crank When the pivot of this lever is no longerfixed, but ableto move freely, the transmission of the movement upon thelever (10) through the sliding rod (36) will cease. In the printingposition of the counting mechanism the pivot (34) fixed by a lever (42)swinging on a pivot (41), and carrying a pivotal point (34) for thelever will rest against a projection (43) of a lever (46) swinging abouta pivot (44). If however (46) is swung round the pivot (44) so that theprojection (43) is out of reach of the lever (42), as shown on Fig. 7,the lever (42) may oscillate freely round the pivot (42), so

that the cranking movement of the rod' 36) is no longer transmitted uponthe lever The movement of the lever (46) is produced by the sliding rod(47 from the double lever (48), the latter lever being moved i therelease key (49) as shown on Fig. 6 namely by slidingthe rail (50) inthe direction of the arrow marked on Fig. 6. After the type lever hasbeen set, the impression is made by means of the hammer levers (51)which can turn on the pivots (52) and which are under the influence ofthe springs (53) in such a way that, after releasing the catches (54-),engaging in hooks (54) on the hammers, the advancecontrolled type leverstrikes the type ribbon and-the printing paper. The peculiarity of thishammer drive is the .release of the locking hooks (54), and theconsecutive mutual coupling of these hammers towards the right with theobject of printing the ciphers, and also forprinting groups of Theselocking hooks (54) are released by the driving spindle (55) in thefollowing manner: After the driving spindle has travelled through acertain distance a stop (56) is arrested by coming up against a stop(57) of a lever (58). This, latter lever moves another lever (60)provided with a hooked projection, carrying it along by means of thecross bar (59). In this manner the'hooked lever is released. (Compare.alsoFig. 1 with reference to the connection of the hooked levers (54).)

In order, now to print the ciphers if .a number contains severalciphers,- the ham mers are coupled together continuously towards theright, so that when one hammer is struck, the ciphers to the right areprinted. This is done in thefollowing manner: each type lever isprovided with a recess (61) which when the type levers are in thethrough the roller (68).

position of rest, is opposite a projection (62) of a double lever (64),swinging on a pivot (63), so that when this lever withuits projection:(62) drops into the recess (61),

it no longer carries the opposite arm of lever (60), allowing the latterto drop,so thatno uncoupling of the hooked levers (54) from the shacklecan take place. In the normal position all levers (64) are disengagedfrom the recesses (61) of the type levers. However, after the typelevers (l) have been set, the lever (64) is swung so far to the- (62) ofall levers (64) to the left of the highest number drop intocorresponding recesses of the type levers, whereas all levers (64) tothe right of the highest numberare kept in the raised position by -meansof two right angle bends (69) and'(69) extendingin opposite directionsfrom the horizontal arms (64) of the levers (64) and placed,

the one a certain distance above the other, so that the upper bend (69')of a left hand lever, leaving a certain space between them.

Into this clearance space between the levers a locking rod (70) engagesin such a mannerthat, as long as one left hand lever is raised, (i. e.,prevented from dropping into its corresponding recess in the type lever)all other levers to the right of this lever are likewise kept in theraised position, the arms (69) of the right hand levers resting upon thefaces of the locking rods (70).

1 If it is desired, however, to print groups the number of figures inany one group, by disconnecting one. of the coupling rods (7 O) touncouple permanently a series of right hand levers, notwithstanding theconnection of left hand type levers. This may be effected by pushingback the respective coupling rod (70) so that it engages a slot (71) ofa rail (72) which can slide at right angles across, thereby placing theforward extremity of the rod (70) beyond the reach of of numbers, it ispossible, corresponding to the bends (69) and (69) of the levers (64). 1The cooking of the hammers for printing is effected bythe cam disk (67)already described, (compare Fig. 8, but more especially Fig. 6) in sucha manner that a roller (73) or a rocker, (74) embracing all the hammers,and swinging round the runs up upon the periphery 0 this cam ivot (52)disk. The movement of the cam disk is effected by the guide rod (75) andthe cam (76) from the driving shaft (77).

In order to printthe sum total and the group totals in different coloursthe lifting rod (78) of the type ribbon is connected by the double lever(80) swinging on the pivot and Fig. 14 the printing position. For

this second design each type lever is provided, in place of the milledslot (61), with a pin (61), by which a lever (85) swinging on a pivot(84) is pressed down in such a manner, that the rocker (59) is released.thereby rendering a tripping of the corresponding hammers impossible.This pressing down of the levers. (85) takes place in the zero positionof the type levers. In order, however, to release also those hammersplaced to the right of a maximum number, and for printing thecorresponding ciphers, despite the releasing of all levers (85), theselatter are provided with swinging levers (87) which can turn on pivots(86). During this movement the front face of this lever pushes against apin (84) of a left hand adjacent lever (85) so that when this adjacentlever on the left is switched, it carries the preceding lever (87), onthe right, and all the following ones along with it, so that from thehighest number on the left all levers (85) to the right are taken along,thereby also releasing all the printing hammers to the right.

In order, however. to print results in groups, as with the first type ofconstruction. the printing mechanism may be subdivided into groups, byone lever (85) being released in that position in which the subdivisionin groups is to take place, by a special rail (88)being released in thatposition in which the subdvision in groups is to take place, by aspecial rail (88) provided with notches. lVhenever a notch of the rail(88) comes below the left arm of the lever (87), (compare especiallyFigs. 14 and let), this lever is placed beyond the reach of the pin (84)of the adjacent position to the left, by the action of a spring (89).

Claims.

1. A printing device for oalculating machines, comprising, incombination; a driving mechanism; a writing roller; type-bars adapted tobe adjusted by means of said driving mechanism and being arranged infront of said roller; means for vertically guiding said bars; .a countinmechanism and cog-wheels forming mem ers of this mechanism; toothedsegments adapted to co-operate with said cog-wheels; a levermechauismadapted to couple said type-bars with said toothed segments; abutmentsforming members of the driving mechanism and being adapted to beadjusted from the keys of the machine; bell-crank levers having one armextending over the associate abutment; stepped sectors attached to thesearms and being adapted to co-operate with said abutmcnts; ahaminer-mechanism and type hammers forming members of this mechanism; acommon axle for said ham-.

meis; a rocking bar arranged transversely with respect to said typehammers and being adapted to release, them; and means for transmittingmotion from the machine shaft to said rocking'bar.

A printing device for calculating machines, comprising, in combination adriving mechanism; a writin roller; type-bars adapted to be adjusted bymeans of said driving mechanism and being arranged in frontof saidroller; means for vertically guiding said bars; a counting mechanism andco -wheels forming members of this mechanism; toothed segments adaptedto co-operate with said cog-wheels; a levermechanism adapted to couplesaid type-bars with said toothed segments; abutments forming members ofthe driving mechanism and bein adapted to be adjusted from the keys ofthe machine; bell crank levers having one arm extending over theassociate abutment; stepped sectors attached to these arms and beingadapted to co-operate with said abutments; levers having the saidabutments attached to them; bars connecting these levers with said keys;an axle earrying these levers and being so arranged in the drivingmechanism as to be adapted to be laterally displaced in it; ahammermechanism and type hammers forming members of this mechanism; acommon axle for said hammers; a rocking bar arranged transversely withrespect to said type-hammers and being adapted to release them; andmeans for transmitting motion from 'the machine shaft to said rockinbar.

in combination a drivkeys of the machine; bell-crank levers havmg onearm extending over the associate abutment; stepped sectors attached tothese arms and being adapted to co-operate with said abutments; aswitching key; a rail forming a member of the driving mechanism andbeing adapted to be lifted by means of this key; a lever-mechanismconnecting said rail with said toothed segments; another lever-mechanismconnecting the said rail with the abutment-carrying levers; lugs formingmembers of the counting-mechanism and 'a third levermechanism connectingthe said rail with these lugs; a hammer-mechanism and type drivingmechanism and being arranged in front of said roller; means forvertically guiding said barsa counting mechanism and co -wheels fdrmingmembers of. this mechanism; toothed segments adapted to cocrate withsaid cog-wheels; a lever-mechanism adapted to couple said type-bars withsaid toothed segments; a hammer-mechanism and type. hammers formingmembers of this mechanism; a common axle for said hammers; locking hooksforthese latter;

guide-levers hin ed to these hooks; a common driving r for, theselevers; and bellcrank levers adapted to be actuated by means of saidtype-bars and to support said guidelevers substantially as'described. I

5. A printin device for calculating machines, comprising, in combinationa driving mechanism; a writin roller; type-bars adapted to be adjustedriving mechanism and being arranged in front of said roller; means forvertically guiding said bars; a countin mechanism and cog-wheels formingmem ers of this mechanism; toothed segments adapted to cooperate withsaid cog-wheels; a hammermechanism and t pe hammers forming mem bers ofthis mec anism; a common axle for said hammers; locking hooks for theselatter; guide-levers hinged to these hooks; a common driving rod forthese levers; and bell-crank levers having each a downwardly directedarm and a horizontal one with a double bend; projections atthefdownwardly directed arms of saiidhbell-carank lgvers an? e 'nrecesses o t e sai t pears; anc ld tfig g bars, ofwhich each en gagesthe two bands of one of the said bell-crank levers,

substantially as described. 3

by means of said 6. A printing device for calculating machines,comprising, in combination a driving mechanism adapted to be adjusted bymeans of said driving mechanism and being arranged in front of saidroller; means for vertically guiding said bars; a counting mechanism andcogwheels forming members of this mechanism; toothed segments adapted tocooperate with said cog-wheels; a hammermechanism and typeham'mersforming members of this mec anism; a common axle for saidhammers; locking hooks for these latter; guide-levers hinged to thesehooks; a common driving rod for these levers; and bell-crank leversadapted to be switched by means of said type-bars and to support saidguide-levers; combined locking levers so ara writing roller; type-barsranged as to be adapted to engage said bellcrank levers; and rollsadapted to actuate said locking levers, substantially as described.

' 7. A printing device for calculating machines,co mpris1ng, incombination a driving mechanism; a writing roller; type-bars adapted tobe adjusted by means of said driving mechanism and being arranged infront of said roller; and means for vertically guiding said bars; acounting mechanism and cog-wheels forming members of this mechanism;toothed segments adapted to cooperate withsaid cog-wheels; alever-mechanism adapted to couple said type-bars with said toothedsegments; a hammer-mecha- 'nism and type-hammers forming members of thismechanism; a common axle for said hammers; locking hooks for theselatter;

guide-levers hinged to these books; pins secured to thetype-bars andbeing adapted to release said guide-levers; and other levers hinged tosaid latter levers and having their arms bear with their frontal endsainst projections of those of the said guideevers that advance at theleft side, substantially as described. v g

8. A printing device for calculating machines, comprising, incombination a driving mechanism, a writin adapted to be adjuste by meansof said driving mechanism and being arranged in frontvof said roller;means for vertically guiding said bars; a counting mechanism andcog-wheels forming members of this mechanism; toothed segments adaptedto cooperate with said cog-wheels; a lever-mecharoller; type-bars nlsmadapted to couple said type-bars with said toothed segments; ahammer-m'echanism those of the said guide-levers that advance at theleft side; and recessed rails located below said hinged levers andsupporting. them substantially as described.

9. A printing device for calculating niachines, comprising, incombination a driving mechanism, a writing roller; type-bars adapted tobe adjusted by means of said driving mechanism and being arranged infront of said roller; means for vertically gniding said bars; a countingmechanism and cog-wheels forming members of this mechanism; toothedsegments adapted to cooperate with said cog-wheels; a lever-mechanismadapted to couple said type-bars with said toothed segments; abntmentsforming members of the driving mechanism and being adapted to beadjusted from the' keys of the machine; bell-crank levers having one armextending over the associate abutment;

stepped sectors attached to these arms and being adapted to co-operatewith said abutments; a driving crank and motion-trans mittingconnections between it andsaid bellcrank levers; a main-crank andanother lever-mechanism connecting it with the shaft of said drivingcrank; it releasing key, and a third lever-mechanism adapted to beswitched by this key and to support the pivot ofthe before-mentionedlever-mechanism, substantially as described.

In testimon whereof I afiix my signature in presence 0 two witnesses.

MARIA ANNA mucnwmm cu. Bonnie, Adntiitistratriz. WVitnesses:

HERMANN REISING, VVALDEMAR WEiRmsKI.

